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 */

package Source;

import java.security.MessageDigest;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
 *
 * @author Nicolas Caceres
 */
public class MensajeDigest {

    public void MesajeDigest()
    {
        
    }

    public byte[] encrypt(String message) throws Exception {
              final MessageDigest md = MessageDigest.getInstance("md5");
               final byte[] digestOfPassword = md.digest("HG58YZ3CR9"
                                 .getBytes("utf-8"));
              final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
              for (int j = 0, k = 16; j < 8;) {
                         keyBytes[k++] = keyBytes[j++];
              }
              final SecretKey key = new SecretKeySpec(keyBytes, "DESede");
              final IvParameterSpec iv = new IvParameterSpec(new byte[8]);
              final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
              cipher.init(Cipher.ENCRYPT_MODE, key, iv);
              final byte[] plainTextBytes = message.getBytes("utf-8");
              final byte[] cipherText = cipher.doFinal(plainTextBytes);
              // final String encodedCipherText = new sun.misc.BASE64Encoder()
              // .encode(cipherText);
              return cipherText;
       }
       public String decrypt(byte[] message) throws Exception {
              final MessageDigest md = MessageDigest.getInstance("md5");
              final byte[] digestOfPassword = md.digest("HG58YZ3CR9"
                              .getBytes("utf-8"));
              final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
              for (int j = 0, k = 16; j < 8;) {
                         keyBytes[k++] = keyBytes[j++];
              }
              final SecretKey key = new SecretKeySpec(keyBytes, "DESede");
              final IvParameterSpec iv = new IvParameterSpec(new byte[8]);
              final Cipher decipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
              decipher.init(Cipher.DECRYPT_MODE, key, iv);
              // final byte[] encData = new
              // sun.misc.BASE64Decoder().decodeBuffer(message);
              final byte[] plainText = decipher.doFinal(message);
              return new String(plainText, "UTF-8");
        }
}
